Gasoline prices in Idaho

EIA publishes no weekly series for Idaho. The Rocky Mountain (PADD 4) district it belongs to, which is Colorado, Idaho, Montana, Utah and Wyoming, averaged $4.44 a gallon of regular in the week of September 14, 2026, up 12¢ on the week before and up 126¢ on a year ago. That is the district’s figure, not Idaho’s; a station in Idaho can sit well above or below it.

The last 52 weeks, Rocky Mountain

• Sep 22$3.18
• Sep 29$3.11
• Oct 6$3.07
• Oct 13$3.05
• Oct 20$3.00
• Oct 27$2.97
• Nov 3$2.94
• Nov 10$2.91
• Nov 17$2.95
• Nov 24$2.87
• Dec 1$2.78
• Dec 8$2.64
• Dec 15$2.55
• Dec 22$2.49
• Dec 29$2.43
• Jan 5$2.40
• Jan 12$2.42
• Jan 19$2.49
• Jan 26$2.54
• Feb 2$2.57
• Feb 9$2.67
• Feb 16$2.74
• Feb 23$2.66
• Mar 2$2.76
• Mar 9$3.26
• Mar 16$3.64
• Mar 23$3.85
• Mar 30$3.92
• Apr 6$3.89
• Apr 13$3.90
• Apr 20$3.94
• Apr 27$4.02
• May 4$4.36
• May 11$4.37
• May 18$4.59
• May 25$4.56
• Jun 1$4.33
• Jun 8$4.19
• Jun 15$4.10
• Jun 22$3.85
• Jun 29$3.72
• Jul 6$3.66
• Jul 13$3.82
• Jul 20$3.96
• Jul 27$4.08
• Aug 3$4.14
• Aug 10$4.12
• Aug 17$4.29
• Aug 24$4.36
• Aug 31$4.27
• Sep 7$4.31
• Sep 14$4.44

About this figure

The price is the U.S. Energy Information Administration’s weekly retail survey of regular gasoline, all formulations, dollars per gallon including taxes, collected each Monday. EIA publishes state series for nine states; Idaho is not one of them, so the figure above is the Rocky Mountain (PADD 4) average. A year-ago figure is the survey week fifty-two weeks earlier. EIA data are in the public domain. A PADD is a Petroleum Administration for Defense District, one of the five regions (the East Coast split in three) EIA has grouped fuel statistics by since 1942.

The rest of the Rocky Mountain district

The states that share the Rocky Mountain figure: Colorado, Montana, Utah, Wyoming.

Every state and district · what electricity and natural gas cost in Idaho.